Fermenting soy (like in miso or tempeh) makes the healthy compounds in it easier for your body to absorb and use.
Scientific Claim
Fermentation of soy products increases the bioavailability of isoflavones by converting glycosides into active aglycones, potentially enhancing their physiological effects.
Original Statement
“Fermentation by Lactobacillus and Bifidobacteria also results in increased aglycone content. Bau et al. found that by fermenting soymilk for 30 h with kefir culture, glycitin and daidzin were completely hydrolyzed into aglycones, while 89% of genistin was bioconverted.”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design supports claim
Appropriate Language Strength
definitive
Can make definitive causal claims
Assessment Explanation
The claim describes a biochemical process (hydrolysis of glycosides to aglycones) demonstrated in controlled fermentation experiments. Definitive language is justified.
Evidence from Studies
Supporting (0)
Contradicting (1)
This study talks about whether plant foods are healthy despite some scary-sounding chemicals, but it doesn't say anything about fermenting soy or making its good compounds easier for your body to use.